WO2013094472A1 - シーラント用樹脂組成物、積層フィルムおよび包装袋 - Google Patents
シーラント用樹脂組成物、積層フィルムおよび包装袋 Download PDFInfo
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- WO2013094472A1 WO2013094472A1 PCT/JP2012/082046 JP2012082046W WO2013094472A1 WO 2013094472 A1 WO2013094472 A1 WO 2013094472A1 JP 2012082046 W JP2012082046 W JP 2012082046W WO 2013094472 A1 WO2013094472 A1 WO 2013094472A1
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- Prior art keywords
- sealant
- coc
- cop
- layer
- laminated film
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/325—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polycycloolefins
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms
- C08L23/0823—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms with aliphatic cyclic olefins
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L45/00—Compositions of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
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- B32B2307/30—Properties of the layers or laminate having particular thermal properties
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- B32B2307/30—Properties of the layers or laminate having particular thermal properties
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- B32B2307/724—Permeability to gases, adsorption
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- B32B2307/00—Properties of the layers or laminate
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2581/00—Seals; Sealing equipment; Gaskets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/26—Articles or materials wholly enclosed in laminated sheets or wrapper blanks
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0615—Macromolecular organic compounds, e.g. prepolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09K2200/0617—Polyalkenes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1334—Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31938—Polymer of monoethylenically unsaturated hydrocarbon
Definitions
- the present invention relates to a resin composition for a sealant, a laminated film, and a packaging bag, which are excellent in non-adsorption property and barrier property for a low molecular weight organic compound and are capable of stable heat sealing.
- Patent Document 1 discloses that 100 parts by mass of a cycloolefin-based resin mixture composed of 65 to 92% by mass of an amorphous cycloolefin copolymer (COC) and 8 to 35% by mass of an amorphous cycloolefin polymer (COP), A resin composition containing 7 to 30 parts by mass of density polyethylene is described.
- Patent Document 2 discloses 2 to 98% by weight of a cyclic olefin copolymer (COC obtained by copolymerizing a cyclic olefin and an ⁇ -olefin) having a glass transition temperature (Tg) of 30 ° C. or less, and thermoplasticity.
- Tg glass transition temperature
- Patent Document 1 since the amount of COC is large, the problem is that the organic components contained in the contents are likely to be adsorbed to the sealant (low non-adsorbability) when the packaging film is used as a bag, compared to COP. There is. In the case of Patent Document 2, since the Tg of COC is 30 ° C. or lower, there is a problem that non-adsorbability cannot be obtained at a higher temperature.
- This invention is made
- the issue is to provide.
- COP cycloolefin polymer
- a resin composition for a sealant characterized by comprising 1 to 49% by weight of an olefin copolymer (COC) and 1 to 19% by weight of polyethylene (PE).
- the glass transition temperatures of the cycloolefin polymer (COP) and the cycloolefin copolymer (COC) are both preferably 50 to 140 ° C.
- the present invention is a laminated film having a plurality of layers including a base material and a sealant layer that is one outermost surface of the laminated film, wherein the sealant layer is made of the resin composition for sealant.
- a laminated film is provided.
- this invention provides the packaging bag characterized by having the heat seal part which consists of the said laminated
- the present invention it is possible to provide a resin composition for sealant, a laminated film, and a packaging bag capable of improving the non-adsorbability with respect to the organic components contained in the contents and the heat sealability.
- the resin composition for sealant of this embodiment is composed of a resin obtained by blending cycloolefin polymer (COP), cycloolefin copolymer (COC) and polyethylene (PE), and the blending ratio thereof is cycloolefin polymer (COP) 42 to 98. % By weight, 1 to 49% by weight of cycloolefin copolymer (COC), and 1 to 19% by weight of polyethylene (PE).
- COP cycloolefin polymer
- COC cycloolefin copolymer
- PE polyethylene
- the laminated film of the present embodiment has a configuration in which a base material and a sealant layer are laminated with another intermediate layer as necessary, that is, a sealant layer and a base material that are one of the outermost surfaces of the laminated film. Accordingly, it has a plurality of layers such as other intermediate layers, adhesive layers and anchor agent layers.
- the sealant layer is a layer used for heat sealing, and is disposed in the innermost layer in contact with the contents as a packaging material.
- the sealant layer is made of the resin composition for sealant according to this embodiment. Lamination of the base material or other intermediate layer and the sealant layer may be performed via an adhesive layer or an anchor agent layer, or may be directly laminated on the base material.
- the intermediate layer one or more layers such as a reinforcing layer, a gas barrier layer, a light-shielding layer, and a printing layer can be appropriately selected.
- the cycloolefin polymer (COP) used in the sealant of the present invention is, for example, a homopolymer of a cyclic olefin, a copolymer of two or more cyclic olefins, or a hydrogenated product thereof, and is usually referred to as COP (Cycloolefin polymer).
- COP Cycloolefin polymer
- the COP is preferably an amorphous polymer, more preferably a ring-opening polymer of a cyclic olefin by metathesis or the like or a hydrogenated product thereof.
- the COP is preferable because it has a higher ratio of containing an alicyclic structure than COC or the like and is excellent in non-adsorption.
- An example of COP is shown in the following chemical formula (Chemical Formula 1).
- R 1 and R 2 represent the same or different organic group having 1 to 20 carbon atoms or a hydrogen atom, and R 1 and R 2 may form a ring with each other.
- N is 1 Indicates the integer above.
- the cycloolefin copolymer (COC) used in the sealant of the present invention is, for example, a copolymer of one or two or more cyclic olefins and one or two or more acyclic olefins or a hydrogenated product thereof. It is called a COC (Cyclorefin copolymer).
- the COC is preferably an amorphous polymer, more preferably a copolymer of a cyclic olefin and ethylene or a hydrogenated product thereof.
- An example of COC is shown in the following chemical formula (Chemical Formula 2).
- R 1 and R 2 represent the same or different organic group having 1 to 20 carbon atoms or a hydrogen atom, and R 1 and R 2 may form a ring with each other;
- R 3 represents Represents an organic group having 1 to 20 carbon atoms or a hydrogen atom, and m and p each represents an integer of 1 or more.
- examples of the organic group having 1 to 20 carbon atoms include methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, sec-butyl, t-butyl, i-pentyl, t-pentyl, n-hexyl, n-heptyl, n-octyl, t-octyl (1,1-dimethyl-3,3-dimethylbutyl), 2-ethylhexyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, Alkyl groups such as pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, icosyl; cycloalkyl groups such as cyclopentyl, cyclohexyl,
- Examples of the cyclic olefin used as the constituent monomer of the COP and the COC include, for example, vinylcycloalkanes having a cycloalkane having 3 to 20 carbon atoms and derivatives thereof, monocycloalkenes having 3 to 20 carbon atoms, and A derivative thereof or a cyclic olefin having a norbornene skeleton (norbornene monomer) is preferred.
- Examples of the norbornene-based monomer include bicyclo [2.2.1] -2-heptene (norbornene) and its derivatives, tricyclo [4.3.0.1 2,5 , as shown in the following chemical formula (Formula 3).
- Derivatives include those having one or more organic groups (R 1 , R 2 ) having 1 to 20 carbon atoms as substituents, and those having two or more unsaturated bonds such as norbornadiene. .
- Examples of the acyclic olefin used as the constituent monomer of the COC include ethylene, ⁇ -olefins such as propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, and 3-decene. And 3-dodecene.
- the COP is preferably a polymer of a cyclic olefin having a norbornene skeleton or a hydrogenated product thereof
- the COC is preferably a polymer of a cyclic olefin having a norbornene skeleton and an acyclic olefin or a hydrogenated product thereof.
- a commercial item can be used as COP, for example, ZEONEX and ZEONOR made by ZEON CORPORATION can be suitably used.
- Commercially available products can be used as the COC, for example, APPEL manufactured by Mitsui Chemicals, Inc., and TOPAS manufactured by Polyplastics can be suitably used.
- the polyethylene (PE) used in the sealant of the present invention is an ethylene homopolymer (ethylene homopolymer), a linear low-polymer obtained by copolymerizing ethylene and an ⁇ -olefin having 4 carbon atoms (1-butene, etc.).
- Density polyethylene (C 4 -LLDPE), linear low density polyethylene (C 6 -LLDPE) obtained by copolymerizing ethylene and an ⁇ -olefin having 6 carbon atoms (1-hexene, etc.), ethylene and 8 carbon atoms
- Examples thereof include linear low density polyethylene (C 8 -LLDPE), ethylene-vinyl acetate copolymer (EVA) and the like obtained by copolymerizing a single ⁇ -olefin (such as 1-octene).
- the polyethylene (PE) is preferably an ethylene homopolymer or a copolymer of ethylene and an acyclic olefin other than ethylene (eg, ⁇ -olefin).
- PE polyethylene
- ethylene homopolymer such as metallocene linear low density polyethylene (m-LLDPE, LLDPE polymerized by metallocene catalyst), or C 4 ⁇ Ethylene- ⁇ -olefin copolymers such as LLDPE, C 6 -LLDPE, C 8 -LLDPE are preferred because the melting point of the sealant layer can be made moderate.
- the sealant layer used in the laminated film of the present invention is composed of the sealant resin composition.
- An appropriate additive can be added to the resin composition as long as the object of the present invention is not impaired.
- the additive include an antioxidant, a lubricant, an anti-blocking agent, a flame retardant, an ultraviolet absorber, a light stabilizer, an antistatic agent, and a colorant.
- the glass transition temperature (Tg) of the resin composition for sealant is preferably higher than 40 ° C. Non-adsorbability decreases at temperatures below the glass transition temperature.
- the Tg of COP before blending is preferably 50 to 140 ° C.
- the Tg of COC is preferably 50 to 140 ° C. More preferably, the Tg of COP before blending is 50 to 130 ° C., and the Tg of COC is also 50 to 130 ° C.
- the blending ratio of COP, COC and PE is such that the total of the three components is 100% by weight, COP is 42 to 98% by weight, COC is 1 to 49% by weight, and PE is 1 to 19% by weight. is there.
- COP is 42 to 98% by weight
- COC is 1 to 49% by weight
- PE is 1 to 19% by weight.
- the tensile elongation means that the larger the value is, the more easily the film is stretched and flexible.
- the blending ratio of COP, COC, and PE is more preferably 43 to 94% by weight of COP, 3 to 48% by weight of COC, and 3 to 18% by weight of PE, and more preferably 44 to COP. -82 wt%, COC is 9-46 wt%, and PE is 5-12 wt%.
- the blending amount of COP is preferably equal to or greater than the blending amount of COC (COP ⁇ COC), and the blending amount of COC is equal to or greater than the blending amount of PE. Preferred (COC ⁇ PE).
- a stretched film excellent in mechanical properties such as heat resistance and strength and printability is preferable.
- the thickness of the substrate is usually 10 to 50 ⁇ m, preferably 10 to 30 ⁇ m.
- An anchor agent layer or an adhesive layer is preferably interposed inside the sealant layer in order to adhere the sealant layer to a substrate or other film.
- an anchor agent layer in contact with the inside of the sealant layer is formed.
- O-PET is used as the substrate, the anchor agent layer need not be used.
- an adhesive layer in contact with the inside of the sealant layer is formed.
- an adhesive resin such as acid-modified polyolefin may be used.
- an anchoring agent generally used for extrusion laminating methods such as polyurethane, polyether, alkyl titanate (organic titanium compound), etc. can be used. They can be selected together.
- an adhesive which comprises the said adhesive bond layer the adhesive agent generally used for dry lamination methods, such as a polyurethane type and a polyether type
- a gas barrier layer, a reinforcing layer, or the like may exist as an intermediate layer.
- the reinforcing layer has a role of complementing the strength characteristics of the laminated film.
- the resin constituting the reinforcing layer polyolefin resins such as polypropylene (PP) and polyethylene (PE), biaxially stretched polyethylene terephthalate (O-PET), biaxially stretched nylon (O-Ny), biaxially stretched polypropylene ( OPP) and the like.
- the thickness of the reinforcing layer is usually 5 to 50 ⁇ m, preferably 10 to 30 ⁇ m.
- the gas barrier layer has a function of imparting gas barrier properties to block gas such as oxygen and water vapor from passing through the laminated film.
- gas barrier layer examples include metal foil, a vapor deposition layer of aluminum or an inorganic oxide, a gas barrier resin layer such as ethylene-vinyl alcohol copolymer (EVOH), vinylidene chloride.
- EVOH ethylene-vinyl alcohol copolymer
- These gas barrier layers can be provided on one side of the film constituting the base material or the reinforcing layer, and are generally provided as an intermediate layer between the base material and the sealant layer.
- an inorganic oxide vapor deposition layer it can also be used as the outermost layer outside the substrate (the outermost layer on the opposite side of the sealant layer in the laminated film).
- the thickness of the gas barrier layer is usually 5 to 50 ⁇ m, preferably 10 to 30 ⁇ m, when using a metal foil or a gas barrier resin layer.
- a metal vapor deposition layer or an inorganic oxide vapor deposition layer as a gas barrier layer, it can be made thinner than this.
- the method for producing the laminated film of the present invention is not particularly limited, and each layer constituting the laminated film may be appropriately laminated by an extrusion lamination method, a dry lamination method, a co-extrusion method, or a combination thereof.
- the thickness of the sealant layer depends on the use of the packaging material and is not particularly limited, but is usually about 5 to 150 ⁇ m, preferably 15 to 80 ⁇ m.
- the packaging bag of the present embodiment is formed by heat-sealing the above-mentioned laminated film with the sealant layer, and is excellent in non-adsorption and barrier properties of low molecular weight components. It can be suitably used as a packaging bag.
- the form of the packaging bag can be three-sided bags, four-sided bags, joint-attached bags, gusset bags, self-standing bags, etc. It is applicable without particular limitation.
- the spout When the spout is provided in the packaging bag of the present invention, the spout can be suitably used as long as it can ensure sealing performance by joining with the sealant layer of the laminated film constituting the packaging bag, more preferably, It is desirable to join the spout and the laminated film by heat sealing using a spout formed of a sealant layer of the laminated film and a heat-sealable resin.
- the spout may be inserted and heat-sealed while the laminated film is overlapped with the sealant layer inside, and a flange or boat-shaped melt may be formed at one end of the spout.
- An attachment base may be provided, and the flange or fusion base may be heat-sealed with the periphery of the hole provided in the laminated film or the inner surface of the opening of the packaging bag.
- Sealant materials were produced with the compositions shown in Table 1.
- the sealant material was manufactured by a method in which each material was melt-kneaded and then formed into a film having a predetermined thickness by extrusion.
- the COP, COC, and PE used in this example are as follows.
- Heat seal strength According to JIS Z 1526, the seal strength (N / 15 mm) of the heat seal part of the pouch was measured at a tensile speed of 300 mm / min and a width of 15 mm.
- the heat sealing condition is to heat and pressurize at a pressure of 0.2 MPa for 1 second at any temperature among 140 ° C., 160 ° C., 180 ° C., 200 ° C., and 220 ° C.
- Stable region of heat seal strength A temperature range including the maximum value of the heat seal strength measured in (1) and within which the difference from the maximum value is within 1 N / 15 mm is defined as the stable region.
- Examples 1 to 6 were excellent in heat seal strength and non-adsorption, and the tensile elongation was significantly improved compared to COP alone (Comparative Example 2) or COC alone (Comparative Example 7). .
- Comparative Example 1 in which 20% PE was blended with COP and COC, the improvement in heat seal strength was low, and the non-adsorbability at 40 ° C. for 3 months was lower than that of COC alone (Comparative Example 7).
- Comparative Example 2 using COP alone the temperature at which a sufficient heat seal temperature was obtained was as high as 200 ° C. or higher, and a stable region of seal strength was not observed. Moreover, the tensile elongation was low.
- the present invention can be suitably used particularly for packaging of contents containing fragrances and active ingredients such as foods and drinks, cosmetics, and drugs.
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wrappers (AREA)
- Laminated Bodies (AREA)
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- Packages (AREA)
- Sealing Material Composition (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
本願は、2011年12月22日に日本に出願された特願2011-281366号に基づき優先権を主張し、その内容をここに援用する。
特許文献2には、ガラス転移温度(Tg)が30℃以下である環状オレフィン系共重合体(環状オレフィンとα-オレフィンとを共重合して得られるCOC)2~98重量%と、熱可塑性樹脂98~2重量%とからなる熱可塑性樹脂組成物が記載されている。
特許文献2の場合、COCのTgが30℃以下であるため、それより高い温度では非吸着性が得られないという問題がある。
前記シクロオレフィンポリマー(COP)と前記シクロオレフィンコポリマー(COC)のガラス転移温度が、いずれも50~140℃であることが好ましい。
また、本発明は、基材と、積層フィルムの一方の最表面となるシーラント層とを含む複数の層を有する積層フィルムにおいて、前記シーラント層が、前記シーラント用樹脂組成物からなることを特徴とする積層フィルムを提供する。
また、本発明は、前記積層フィルムからなり、前記シーラント層をヒートシールしてなるヒートシール部を有することを特徴とする包装袋を提供する。
本形態例のシーラント用樹脂組成物は、シクロオレフィンポリマー(COP)とシクロオレフィンコポリマー(COC)とポリエチレン(PE)をブレンドした樹脂からなり、その配合比は、シクロオレフィンポリマー(COP)42~98重量%、シクロオレフィンコポリマー(COC)1~49重量%、ポリエチレン(PE)1~19重量%である。
ここで、シーラント層とは、ヒートシールに用いられる層であり、包装材料としては内容品に接する最内層に配置されるものである。前記シーラント層が、本形態例のシーラント用樹脂組成物からなる。
基材または他の中間層とシーラント層との積層は、接着剤層又はアンカー剤層を介しても良いし、基材に直接積層されていても良い。前記中間層としては、補強層、ガスバリア層、遮光層、印刷層など、適宜、一層または複数層を選択することができる。
下記化学式(化1)に、COPの一例を示す。
下記化学式(化2)に、COCの一例を示す。
ノルボルネン系モノマーとしては、例えば、下記化学式(化3)に示すように、ビシクロ[2.2.1]-2-ヘプテン(ノルボルネン)およびその誘導体、トリシクロ[4.3.0.12,5]-3-デセンおよびその誘導体、テトラシクロ[4.4.0.12,5.17,10]-3-ドデセンおよびその誘導体、ペンタシクロ[6.5.1.13,6.02,7.09,13]-4-ペンタデセンおよびその誘導体、ペンタシクロ[7.4.0.12,5.19,12.08,13]-3-ペンタデセンおよびその誘導体、ペンタシクロ[8.4.0.12,5.19,12.08,13]-3-ヘキサデセンおよびその誘導体、ペンタシクロ[6.6.1.13,6.02,7.09,14]-4-ヘキサデセンおよびその誘導体、ヘキサシクロ[6.6.1.13,6.110,13.02,7.09,14]-4-ヘプタデセンおよびその誘導体、ヘプタシクロ[8.7.0.12,9.14,7.111,17.03,8.012,16]-5-エイコセンおよびその誘導体、ヘプタシクロ[8.7.0.13,6.110,17.112,15.02,7.011,16]-4-エイコセンおよびその誘導体、ヘプタシクロ[8.8.0.12,9.14,7.111,18.03,8.012,17]-5-ヘンエイコセンおよびその誘導体、オクタシクロ[8.8.0.12,9.14,7.111,18.113,16.03,8.012,17]-5-ドコセンおよびその誘導体、ノナシクロ[10.9.1.14,7.113,20.115,18.02,10.03,8.012,21.014,19]-5-ペンタコセンおよびその誘導体等が挙げられる。誘導体としては、置換基として上記炭素数1~20の有機基(R1、R2)を1つまたは2つ以上有するものや、ノルボルナジエンのように不飽和結合を2以上有するもの等が挙げられる。
COPとしては市販品を用いることができ、例えば日本ゼオン株式会社製のゼオネックス、ゼオノアを好適に用いることができる。COCとしては市販品を用いることができ、例えば三井化学株式会社製のアペル、ポリプラスチック社製のTOPASを好適に用いることができる。
ポリエチレン(PE)は、エチレンホモポリマー、またはエチレンとエチレン以外の非環状オレフィン(例えばα-オレフィン)との共重合体が好ましい。
ポリエチレン(PE)は、前記樹脂自身の融点や組成物中の配合量を適宜選択することが好ましい。ポリプロピレン(PP)のような比較的高融点のポリオレフィン系樹脂に比べると、メタロセン系直鎖状低密度ポリエチレン(m-LLDPE。メタロセン触媒により重合したLLDPE)等のエチレンホモポリマー、あるいは、C4-LLDPE、C6-LLDPE、C8-LLDPE等のエチレン-α-オレフィン共重合体は、シーラント層の融点を適度なものとすることができるので、好ましい。
前記シーラント用樹脂組成物のガラス転移温度(Tg)は、40℃より高いことが好ましい。ガラス転移温度以下の温度では非吸着性が低下する。ブレンド前のCOPのTgは50~140℃であり、COCのTgも50~140℃であることが好ましい。また、ブレンド前のCOPのTgが50~130℃であり、COCのTgも50~130℃であることがより好ましい。
また、COPとCOCとPEとの配合比は、より好ましくは、COPが43~94重量%、COCが3~48重量%、PEが3~18重量%であり、さらに好ましくは、COPが44~82重量%、COCが9~46重量%、PEが5~12重量%である。
COPとCOCとPEとの配合量の関係は、COPの配合量がCOCの配合量以上であることが好ましく(COP≧COC)、また、COCの配合量がPEの配合量以上であることが好ましい(COC≧PE)。
前記アンカー剤層を構成するアンカー剤としては、ポリウレタン系、ポリエーテル系、アルキルチタネート(有機チタン化合物)系等、一般的に押出ラミネート法に使用されるアンカー剤が使用でき、積層フィルムの用途に合わせて選択可能である。
前記接着剤層を構成する接着剤としては、ポリウレタン系、ポリエーテル系等、一般的にドライラミネート法に使用される接着剤を使用でき、積層フィルムの用途に合わせて選択可能である。
補強層は積層フィルムの強度特性を補完する役割を有する。補強層を構成する樹脂としては、ポリプロピレン(PP)、ポリエチレン(PE)等のポリオレフィン系樹脂、2軸延伸ポリエチレンテレフタレート(O-PET)、2軸延伸ナイロン(O-Ny)、2軸延伸ポリプロピレン(OPP)等を挙げることができる。補強層の厚みは、通常5~50μmであり、好ましくは10~30μmである。
ガスバリア層の厚みは、金属箔またはガスバリア性樹脂層による場合は通常5~50μmであり、好ましくは10~30μmである。ガスバリア層として金属蒸着層または無機酸化物蒸着層を用いる場合には、これより薄くすることができる。
本形態例の積層フィルムにおいて、シーラント層の厚さは、包装材料の用途にも依存し、特に限定されないが、通常は5~150μm程度であり、好ましくは15~80μmである。
本形態例の包装袋は、上述の積層フィルムを前記シーラント層によりヒートシールしてなるものであり、低分子量成分の非吸着性およびバリア性にも優れているから、飲食物や化粧品、薬剤等の包装袋として好適に利用できる。包装袋の形態は、三方袋、四方袋、合掌貼り袋、ガゼット袋、自立袋等の包装袋(パウチ)のほか、例えばバッグインボックス用の内袋やドラム缶内装袋などの大型の袋等、特に限定なく適用可能である。
表1に示す組成により、シーラント材を製造した。シーラント材の製造は、各材料を溶融混練後、押出成形により、所定の厚さのフィルム状に成形する方法により実施した。
なお、本実施例で用いたCOP、COCおよびPEは、次のとおりである。
「COP」・・・シクロオレフィンポリマー(日本ゼオン株式会社製、商品名ZEONOR(登録商標)1020R。Tg=102℃、MFR=20g/10min(280℃)、ρ=1.01g/cm3)
「COC」・・・シクロオレフィンコポリマー(ポリプラスチックス株式会社製、商品名TOPAS(登録商標)8007F-04。Tg=78℃、MVR=32cm3/10min(260℃)、ρ=1.02g/cm3)
「PE(1)」・・・オクテン-1共重合LLDPE(Tm=121℃、MFR=2.0g/10min、ρ=0.923g/cm3)
「PE(2)」・・・メタロセン触媒LLDPE(Tm=55℃、MFR=1.0g/10min、ρ=0.870g/cm3)
「PE(3)」・・・メタロセン触媒LLDPE(Tm=126℃、MFR=4.0g/10min、ρ=0.937g/cm3)
厚み30μmのシーラント材をPETフィルムおよびAl箔とドライラミネートにより貼り合わせ、PET12μm/Al箔9μm/シーラント材30μmの層構成を有する積層フィルムを得た。
上記積層フィルムからパウチを作製し、下記に説明する評価を行った。ただし(4)の引張特性は、シーラント材から作製した試験片を評価した。
JIS Z 1526に準じて、パウチのヒートシール部のシール強度(N/15mm)を引張速度300mm/min、幅15mmにて測定した。ヒートシール条件は、140℃、160℃、180℃、200℃、220℃のうちのいずれかの温度において、圧力0.2MPaで1秒間加熱および加圧するものである。
(1)で測定したヒートシール強度の最大値を含み、かつ最大値との差が1N/15mm以内の範囲に収まる温度範囲を、安定領域と定義した。
有効成分として酢酸α-トコフェロール(ビタミンEアセテート)を含む市販の化粧水2.5mlをパウチに入れ、パウチの開口部を圧力0.2MPa、時間1秒、温度180℃でヒートシールして密封した。密封したパウチを40℃で1ヶ月ないし3ヶ月保管した後に開封し、化粧水中の酢酸α-トコフェロールの残存量を高速液体クロマトグラフィ法で定量し、前記残存量をもとに有効成分の残存率を算出した。なお、1ヶ月後評価用のパウチと3ヶ月評価後用のパウチは別々に用意し、それぞれの保管期間経過後にパウチを開封して酢酸α-トコフェロールの残存率を測定した。
シーラント材の引張強度(N/15mm)及び引張伸度(%)は、JIS K 7127「プラスチック-引張特性の試験方法」に規定された測定方法に準じて測定した。試験片の幅は15mm、引張速度は300mm/minとした。引張伸度の掴み具間は50mmとした。
COPおよびCOCとともにPEを20%配合した比較例1では、ヒートシール強度の向上が低く、40℃で3ヶ月の非吸着性がCOC単独(比較例7)よりも低くなった。
COPを単独で用いる比較例2では、十分なヒートシール温度が得られる温度が200℃以上と高温であり、シール強度の安定領域がみられなかった。また、引張伸度が低かった。
COPとPEを配合した比較例3では、ヒートシール強度はCOP単独(比較例2)より高いが、160℃以下でほとんど向上しなかった。また、引張伸度の向上も低かった。
COPとCOCを配合した比較例4,5では、ヒートシール強度はCOP単独(比較例2)より高いが、引張伸度は同程度であった。
COCとPEを配合した比較例6では、ヒートシール強度はCOC単独(比較例7)より向上せず、非吸着性は低下した。また、引張伸度の向上も低かった。
COCを単独で用いる比較例7では、180℃程度の低温ではヒートシール温度が良いが、それ以上の温度ではヒートシール温度が下降し、安定領域がみられなかった。また、引張伸度が低かった。
なお、表には示さないものの、COP:COC:PE=1:1:1の配合では効果はなかった。
Claims (4)
- シクロオレフィンポリマー(COP)とシクロオレフィンコポリマー(COC)とポリエチレン(PE)をブレンドした樹脂からなり、その配合比は、シクロオレフィンポリマー(COP)42~98重量%、シクロオレフィンコポリマー(COC)1~49重量%、ポリエチレン(PE)1~19重量%であることを特徴とするシーラント用樹脂組成物。
- 前記シクロオレフィンポリマー(COP)と前記シクロオレフィンコポリマー(COC)のガラス転移温度が、いずれも50~140℃であることを特徴とする請求項1に記載のシーラント用樹脂組成物。
- 基材と、積層フィルムの一方の最表面となるシーラント層とを含む複数の層を有する積層フィルムにおいて、前記シーラント層が、請求項1または2に記載のシーラント用樹脂組成物からなることを特徴とする積層フィルム。
- 請求項3に記載の積層フィルムからなり、前記シーラント層をヒートシールしてなるヒートシール部を有することを特徴とする包装袋。
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2856513A CA2856513C (en) | 2011-12-22 | 2012-12-11 | Resin composition for sealant, laminated film, and packaging bag |
| KR1020147014241A KR101977599B1 (ko) | 2011-12-22 | 2012-12-11 | 실란트용 수지 조성물, 적층 필름 및 포장백 |
| CN201280059044.0A CN103958638B (zh) | 2011-12-22 | 2012-12-11 | 密封剂用树脂组合物、层叠膜以及包装袋 |
| JP2013550233A JP5982401B2 (ja) | 2011-12-22 | 2012-12-11 | シーラント用樹脂組成物、積層フィルムおよび包装袋 |
| EP12860386.7A EP2796524B1 (en) | 2011-12-22 | 2012-12-11 | Resin composition for sealant, laminated film, and packaging bag |
| IN941MUN2014 IN2014MN00941A (ja) | 2011-12-22 | 2012-12-11 | |
| US14/360,076 US20140308466A1 (en) | 2011-12-22 | 2012-12-11 | Resin Composition For Sealant, Laminated Film, And Packaging Bag |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-281366 | 2011-12-22 | ||
| JP2011281366 | 2011-12-22 |
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| WO2013094472A1 true WO2013094472A1 (ja) | 2013-06-27 |
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| PCT/JP2012/082046 Ceased WO2013094472A1 (ja) | 2011-12-22 | 2012-12-11 | シーラント用樹脂組成物、積層フィルムおよび包装袋 |
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| Country | Link |
|---|---|
| US (1) | US20140308466A1 (ja) |
| EP (1) | EP2796524B1 (ja) |
| JP (1) | JP5982401B2 (ja) |
| KR (1) | KR101977599B1 (ja) |
| CN (1) | CN103958638B (ja) |
| CA (1) | CA2856513C (ja) |
| IN (1) | IN2014MN00941A (ja) |
| WO (1) | WO2013094472A1 (ja) |
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| JP2015030113A (ja) * | 2013-07-31 | 2015-02-16 | 大日本印刷株式会社 | 包装材料 |
| JP2016172376A (ja) * | 2015-03-17 | 2016-09-29 | Dic株式会社 | バリア性積層体及びこれを用いた包装材 |
| JP2019011098A (ja) * | 2017-06-30 | 2019-01-24 | 大日本印刷株式会社 | 高圧処理用包装材料 |
| JP2019155868A (ja) * | 2018-03-16 | 2019-09-19 | 藤森工業株式会社 | 積層フィルム及び包装袋 |
| JP2022049318A (ja) * | 2020-09-16 | 2022-03-29 | 凸版印刷株式会社 | 蓋材 |
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| CA2857460C (en) * | 2012-01-11 | 2019-08-20 | Fujimori Kogyo Co., Ltd. | Sealant resin composition, laminated film, and packaging bag |
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- 2012-12-11 IN IN941MUN2014 patent/IN2014MN00941A/en unknown
- 2012-12-11 EP EP12860386.7A patent/EP2796524B1/en active Active
- 2012-12-11 US US14/360,076 patent/US20140308466A1/en not_active Abandoned
- 2012-12-11 JP JP2013550233A patent/JP5982401B2/ja active Active
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| JP2015030113A (ja) * | 2013-07-31 | 2015-02-16 | 大日本印刷株式会社 | 包装材料 |
| JP2016172376A (ja) * | 2015-03-17 | 2016-09-29 | Dic株式会社 | バリア性積層体及びこれを用いた包装材 |
| JP2019011098A (ja) * | 2017-06-30 | 2019-01-24 | 大日本印刷株式会社 | 高圧処理用包装材料 |
| JP7227689B2 (ja) | 2017-06-30 | 2023-02-22 | 大日本印刷株式会社 | 高圧処理用包装材料 |
| JP2019155868A (ja) * | 2018-03-16 | 2019-09-19 | 藤森工業株式会社 | 積層フィルム及び包装袋 |
| JP2022049318A (ja) * | 2020-09-16 | 2022-03-29 | 凸版印刷株式会社 | 蓋材 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103958638B (zh) | 2016-05-25 |
| US20140308466A1 (en) | 2014-10-16 |
| EP2796524A1 (en) | 2014-10-29 |
| KR101977599B1 (ko) | 2019-05-13 |
| CA2856513A1 (en) | 2013-06-27 |
| CN103958638A (zh) | 2014-07-30 |
| EP2796524B1 (en) | 2016-06-08 |
| EP2796524A4 (en) | 2015-06-24 |
| IN2014MN00941A (ja) | 2015-05-01 |
| JP5982401B2 (ja) | 2016-08-31 |
| CA2856513C (en) | 2019-08-20 |
| JPWO2013094472A1 (ja) | 2015-04-27 |
| KR20140107218A (ko) | 2014-09-04 |
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